Jambs m-ccarthy



JAMES-McC-ARTHY, OF NEW YR, N. Y.

Letters Patent No. 77.503. (hated May 5, 1868.

IMPROVEMENT IN EXTENSION -PIPE GOUPL-IN G.

tite' intitule referat in .in these lettera rztin mit making grft'nftigt anni.

TO ALLl WHOM IT MAY CONCERN:

Be it known that I, JA'MESvMcCARTHY, of the city, county, and State ofNew York, have invented a new and improved Extension-Pipe Coupling; andI do hereby declare that' the following is a full, clear, and exactdescription thereof, which will enable others skilled in the art to makeand use the same, reference being had to the accompanying drawings,forming part of this specification, in which"- Figure 1 represents alongitudinal section of my improved pipe-coupling. v

Figure 2 is amend view of the same.

Similar letters of reference indicate corresponding parts.

This invention relates to a new.pipe'coupling, which is so arranged thattheends'vof pipes thatA are a greateror less distance apart from eachother can b c connected by the same. Its object is to take the strainfrom the pipes, and to make 'np small spaces which may be left betweenthe ends of the pipes. I

The invention consists in thc use of two pieces of pipe, of which onescrews into the other, so that the whole length may bo increased ordiminished at will. At the outer-'end of each piee'is a screw-thread orother means of connecting it to the pipe;

The invention is applicable to steam, gas, water, and other pipes.

A represents a. tubular piece, which is provided with a screwthread, a,around its surface, the same extending from its inner endalmost to theouter end. i

B is a. tubular piece, having'a screw-thread, o, on its inside, whichcorresponds to that"on Aso that the two pieces can be screwedtogethexy'as shown.

In the outer end of each piec'e,'-A and B, is an internal screw-thread,or its equivalent, by which each piece can be secured to a. piece ofpipe, as shown by red lines inhg. l. Itkwill be seen that, by thisarrangement, the coupling A B can be niadelonger or shorter at will.

C is ajam-nut, which has a conical end corresponding to a similardepression or concave in the inner end of B. By means of this nut thepieces can, at all times, be firmly secured in any position.

By having one or indre branches on the piece A or B, three or more pipesmay be connectedl by this coupling.

Haring thus described my invention, what -I lclaim as new, and desire tosecure by Letters Patent, 'is.-

1. An extension-pipe coupling, made by connecting the tabular pieces Aand B, substantially in 'the manner set forth.

2. The above in combination with the jam-nut C, made as herein shown anddescribed.

1 JAMES MCCARTHY. Witnesses y WM. F. McNAMAnA,

ALEX. F. ROBERTS.

